62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
import React from 'react';
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import styles from '../DocumentEdit.scss';
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import classNames from 'classnames/bind';
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const cx = classNames.bind(styles);
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class EditorPane extends React.Component {
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static propTypes = {
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children: React.PropTypes.node.isRequired,
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onScroll: React.PropTypes.func.isRequired,
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scrollTop: React.PropTypes.number,
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fullWidth: React.PropTypes.bool,
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};
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componentWillReceiveProps = nextProps => {
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if (nextProps.scrollTop) {
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this.scrollToPosition(nextProps.scrollTop);
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}
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};
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componentDidMount = () => {
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this.refs.pane.addEventListener('scroll', this.handleScroll);
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};
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componentWillUnmount = () => {
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this.refs.pane.removeEventListener('scroll', this.handleScroll);
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};
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handleScroll = e => {
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setTimeout(() => {
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const element = this.refs.pane;
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const contentEl = this.refs.content;
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this.props.onScroll(element.scrollTop / contentEl.offsetHeight);
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}, 50);
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};
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scrollToPosition = percentage => {
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const contentEl = this.refs.content;
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// Push to edges
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if (percentage < 0.02) percentage = 0;
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if (percentage > 0.99) percentage = 100;
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this.refs.pane.scrollTop = percentage * contentEl.offsetHeight;
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};
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render() {
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return (
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<div
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className={cx(styles.editorPane, { fullWidth: this.props.fullWidth })}
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ref="pane"
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>
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<div ref="content" className={styles.paneContent}>
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{this.props.children}
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</div>
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</div>
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);
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}
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}
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export default EditorPane;
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